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Biology Chapter 13 Discussion Questions

Biology Chapter 13 Discussion Questions - a Single-Loop...

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Drew Rasmussen Biology 192 Lab Matt Schmasow April 20 th , 2011 Chapter 13 Pre-Lab Questions Chapter 13 1. What is the difference between double loop and single loop circulation? Which classes of vertebrates have double loop circulation, and which have single loop circulation? 2. In the Class Actinopterygii, what are gills? 3. A frog (Class Amphibia) has no diaphragm. How then does air enter the lungs? 4. For the following animals, how many chambers do their hearts have? (1) Sockeye Salmon (2) Black-footed Ferret (3) Columbia Spotted Frog 1. With single loop circulation, blood passes through the heart once and then provides the body with oxygen, and with double loop the blood passes through the heart twice.
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Unformatted text preview: a. Single-Loop Circulation – Class Actinopterygii, Class Sarcopterygii b. Double-Loop Cicrulation – Class Amphibia, Class Reptilia 2. In the class Atinopterygii the animals have gills with opercula. The opercula can open and close forcing water over the gills so that oxygen can diffuse into the circulatory system of the animal. 3. Since the frog has no lungs it draws air into its mouth by closing its windpipe and depressing the floor of its mouth to draw air in through the nostrils. Then the nostrils are closed, the floor elevated to push air into the lungs. 4. Heart Chambers a. Sockeye Salmon - 2 b. Black-footed Ferret - 4 c. Columbia Spotted Frog - 3...
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